A cyst is a structure or mass that consists of a cellular lined sac. It is typically filled with fluid but may be filled with solid material. It can be congenital, traumatic, or acquired. They may develop nearly anywhere in the body and usually require complete excision for eradication or they are likely to recur. Fluid filled sacs that are not cellular lined may be called pseudo-cysts.
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2

Several ways:
Often a bartholin's cyst requires no treatment . When needed, treatment depends on the size of the cyst, your discomfort level and whether it's infected, which can result in an abscess.
1- treatment options (sitz baths).
2-surgical drainage.
3-antibiotics.
4-marsupialization if it come back and bother you.
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8

It drains:
It should be cultured as it may be infected or sterile and you may need antibiotics, usually if you have a barth cyst , you want it drained before it ruptures, you should go see your gyn or go to the er to be checked.
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